The monthly electricity bill is more than 500 kWh?

This is not normal. A refrigerator consumes about 24 hours of electricity 1 degree, about 30 degrees a month, and the air conditioner is fully turned on about 8 degrees 24 hours, but you only turn on the air conditioner from Monday to Friday night, and the electricity is about three degrees a day.

30+3×20 (20 days from Monday to Friday * *) +8×8 (open all day on weekends) = 154 degrees.

That's about it, so 500 degrees is not normal.